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Ser1778 of 53BP1 Plays a Role in DNA Double-strand Break Repairs
Jung-HeeLee, Hyang-MinCheong, Mi-YoungKang, Sang-YoungKim, YoonsungKang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.5 2 343-348 (6 pages)
an important genome stability regulator, which protects cells against double-strand breaks. Following DNA damage, 53BP1 is rapidly recruited to sites of DNA breakage, along with other DNA damage response proteins, including γ-H2AX, MDC1, and BRCA1. The recruitment of 53BP1 requires a tandem Tudor fold which associates with methylated histones H3 and H4. It has already been determined that the... the BRCT domain of 53BP1 in DNA repair. From our data, we were able to detect differences in the phosphorylation patterns in Ser25 and Ser1778 of 53BP1 after neocarzinostatin-induced DNA damage. Furthermore, the foci formation patterns in both phosphorylation sites of 53BP1 also evidenced sizeable differences following DNA damage. From our results, we concluded that each phosphoryaltion site of 53BP1 performs different roles, and Ser1778 is more important than Ser25 in the process of DNA repair. -
The oncogenic effects of p53-inducible gene 3 (PIG3) in colon cancer cells
Seon-JooPark, HongBeumKim, JeehoKim, SanggonPark, SeokWonKim, Jung-HeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.2 15 267-273 (7 pages)
of Chk1, Chk2 and H2AX. PIG3 also associates with sensor complex components, such as g-H2AX and 53BP1 in DNA damage foci after DNA damage, and contributes to the recruitment of 53BP1, Mre11, Rad50 and Nbs1 to the sites of DNA breaks. A recent study has also revealed a new mechanism of PIG3 function in the DNA damage response by regulating the homeostasis of DNA-PKcs, which plays a role in... The p53-inducible gene 3 (PIG3), initially identified as a gene downstream of p53, plays an important role in the apoptotic process triggered by p53-mediated reactive oxygen species (ROS) production. Recently, several studies have suggested that PIG3 may play a role in various types of cancer. However, the functional significance of PIG3 in cancer remains unclear. Here, we found that PIG3 was highly expressed in human colon cancer cell lines compared to normal colonderived fibroblasts....